The assumption that increasing the efficiency of light sources will decreae energy use for lighting is nothing more than that -- an assumption not based on any actual evidence. There is some evidence that increasing energy efficiency actually increases energy use because energy becomes a cheaper input.
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The assumption that increasing the efficiency of light sources will decreae energy use for lighting is nothing more than that -- an assumption not based on any actual evidence. There is some evidence that increasing energy efficiency actually increases energy use because energy becomes a cheaper input.
See:
http://www.energytribune.com/articles.cfm/5176/Energy-Conservation-and-Future-Energy-Demand
and...
http://en.wikipedia.org/wiki/Jevons_paradox